how can I set default block size for a specific path? I don't know which property to be set in './alluxio fsadmiin pathConf ' command.
You can set the default block size for Alluxio files with alluxio.user.block.size.bytes.default and the default size is 64MB.
You can read more about this property and other related properties here: https://docs.alluxio.io/os/user/stable/en/reference/Properties-List.html#alluxio.user.block.size.bytes.default